| /* |
| * TSC2005 touchscreen driver |
| * |
| * Copyright (C) 2006-2010 Nokia Corporation |
| * Copyright (C) 2015 QWERTY Embedded Design |
| * Copyright (C) 2015 EMAC Inc. |
| * |
| * Based on original tsc2005.c by Lauri Leukkunen <lauri.leukkunen@nokia.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #include <linux/input.h> |
| #include <linux/module.h> |
| #include <linux/of.h> |
| #include <linux/spi/spi.h> |
| #include <linux/regmap.h> |
| #include "tsc200x-core.h" |
| |
| static const struct input_id tsc2005_input_id = { |
| .bustype = BUS_SPI, |
| .product = 2005, |
| }; |
| |
| static int tsc2005_cmd(struct device *dev, u8 cmd) |
| { |
| u8 tx = TSC200X_CMD | TSC200X_CMD_12BIT | cmd; |
| struct spi_transfer xfer = { |
| .tx_buf = &tx, |
| .len = 1, |
| .bits_per_word = 8, |
| }; |
| struct spi_message msg; |
| struct spi_device *spi = to_spi_device(dev); |
| int error; |
| |
| spi_message_init(&msg); |
| spi_message_add_tail(&xfer, &msg); |
| |
| error = spi_sync(spi, &msg); |
| if (error) { |
| dev_err(dev, "%s: failed, command: %x, spi error: %d\n", |
| __func__, cmd, error); |
| return error; |
| } |
| |
| return 0; |
| } |
| |
| static int tsc2005_probe(struct spi_device *spi) |
| { |
| int error; |
| |
| spi->mode = SPI_MODE_0; |
| spi->bits_per_word = 8; |
| if (!spi->max_speed_hz) |
| spi->max_speed_hz = TSC2005_SPI_MAX_SPEED_HZ; |
| |
| error = spi_setup(spi); |
| if (error) |
| return error; |
| |
| return tsc200x_probe(&spi->dev, spi->irq, &tsc2005_input_id, |
| devm_regmap_init_spi(spi, &tsc200x_regmap_config), |
| tsc2005_cmd); |
| } |
| |
| static int tsc2005_remove(struct spi_device *spi) |
| { |
| return tsc200x_remove(&spi->dev); |
| } |
| |
| #ifdef CONFIG_OF |
| static const struct of_device_id tsc2005_of_match[] = { |
| { .compatible = "ti,tsc2005" }, |
| { /* sentinel */ } |
| }; |
| MODULE_DEVICE_TABLE(of, tsc2005_of_match); |
| #endif |
| |
| static struct spi_driver tsc2005_driver = { |
| .driver = { |
| .name = "tsc2005", |
| .of_match_table = of_match_ptr(tsc2005_of_match), |
| .pm = &tsc200x_pm_ops, |
| }, |
| .probe = tsc2005_probe, |
| .remove = tsc2005_remove, |
| }; |
| module_spi_driver(tsc2005_driver); |
| |
| MODULE_AUTHOR("Michael Welling <mwelling@ieee.org>"); |
| MODULE_DESCRIPTION("TSC2005 Touchscreen Driver"); |
| MODULE_LICENSE("GPL"); |
| MODULE_ALIAS("spi:tsc2005"); |